com.brightsparklabs.asanti.model.schema.constraint.AsnSchemaNumericValueConstraint Maven / Gradle / Ivy

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A dynamic ASN.1 Parser
There is a newer version: 4.8.0
/*
 * Maintained by brightSPARK Labs.
 * www.brightsparklabs.com
 *
 * Refer to LICENSE at repository root for license details.
 */

package com.brightsparklabs.asanti.model.schema.constraint;

import static com.google.common.base.Preconditions.*;

import com.brightsparklabs.asanti.model.schema.type.AsnSchemaComponentType;
import com.brightsparklabs.asanti.model.schema.type.AsnSchemaType;
import com.brightsparklabs.asanti.schema.AsnPrimitiveType;
import com.brightsparklabs.asanti.validator.FailureType;
import com.brightsparklabs.asanti.validator.failure.SchemaConstraintValidationFailure;
import com.google.common.collect.ImmutableSet;
import java.math.BigInteger;

/**
 * Models a minimum/maximum value 'bounded' numeric value constraint from within a {@link
 * AsnSchemaType} or {@link AsnSchemaComponentType}. E.g. {@code INTEGER (0 .. 256)}.
 *
 * @author brightSPARK Labs
 */
public class AsnSchemaNumericValueConstraint extends AbstractAsnSchemaConstraint {
    // -------------------------------------------------------------------------
    // INSTANCE VARIABLES
    // -------------------------------------------------------------------------

    /** the minimum value the data can be */
    private final BigInteger minimumValue;

    /** the minimum value the data can be */
    private final BigInteger maximumValue;

    // -------------------------------------------------------------------------
    // CONSTRUCTION
    // -------------------------------------------------------------------------

    /**
     * Default constructor
     *
     * @param minimumValue the minimum value the data can be
     * @param maximumValue the minimum value the data can be
     * @throws NullPointerException if any of the parameters are {@code null}
     */
    public AsnSchemaNumericValueConstraint(BigInteger minimumValue, BigInteger maximumValue) {
        checkNotNull(minimumValue);
        checkNotNull(maximumValue);
        this.minimumValue = minimumValue;
        this.maximumValue = maximumValue;
    }

    // -------------------------------------------------------------------------
    // IMPLEMENTATION: AbstractAsnSchemaConstraint
    // -------------------------------------------------------------------------

    /**
     * Checks if the value in the supplied array falls between the minimum and maximum bounds of
     * this constraint. The value of the array is read via {@link BigInteger#BigInteger(byte[])}.
     *
     * @param bytes the bytes to test
     * @return any failures encountered in applying the constraint to the supplied bytes
     */
    @Override
    public ImmutableSet applyToNonNullBytes(
            byte[] bytes, final AsnPrimitiveType type) {
        try {
            final BigInteger value = new BigInteger(bytes);
            final boolean conforms =
                    (value.compareTo(minimumValue) >= 0) && (value.compareTo(maximumValue) <= 0);
            if (conforms) {
                return ImmutableSet.of();
            } else {
                final String error =
                        String.format(
                                "Expected a value between %s and %s, but found: %s",
                                minimumValue.toString(), maximumValue.toString(), value.toString());
                final SchemaConstraintValidationFailure failure =
                        new SchemaConstraintValidationFailure(FailureType.SchemaConstraint, error);
                return ImmutableSet.of(failure);
            }
        } catch (final NumberFormatException ex) {
            final String error =
                    String.format(
                            "Expected a value between %s and %s, but no value found",
                            minimumValue.toString(), maximumValue.toString());
            final SchemaConstraintValidationFailure failure =
                    new SchemaConstraintValidationFailure(FailureType.SchemaConstraint, error);
            return ImmutableSet.of(failure);
        }
    }
}